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-rw-r--r--drivers/gpio/Makefile1
-rw-r--r--drivers/gpio/mvmfp.c87
-rw-r--r--include/mvmfp.h100
3 files changed, 188 insertions, 0 deletions
diff --git a/drivers/gpio/Makefile b/drivers/gpio/Makefile
index 398024c..a5fa2b5 100644
--- a/drivers/gpio/Makefile
+++ b/drivers/gpio/Makefile
@@ -27,6 +27,7 @@ LIB := $(obj)libgpio.o
COBJS-$(CONFIG_AT91_GPIO) += at91_gpio.o
COBJS-$(CONFIG_KIRKWOOD_GPIO) += kw_gpio.o
+COBJS-$(CONFIG_MARVELL_MFP) += mvmfp.o
COBJS-$(CONFIG_MXC_GPIO) += mxc_gpio.o
COBJS-$(CONFIG_PCA953X) += pca953x.o
COBJS-$(CONFIG_S5P) += s5p_gpio.o
diff --git a/drivers/gpio/mvmfp.c b/drivers/gpio/mvmfp.c
new file mode 100644
index 0000000..5646ed4
--- /dev/null
+++ b/drivers/gpio/mvmfp.c
@@ -0,0 +1,87 @@
+/*
+ * (C) Copyright 2010
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>,
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#include <common.h>
+#include <asm/io.h>
+#include <mvmfp.h>
+#include <asm/arch/mfp.h>
+#ifdef CONFIG_ARMADA100
+#include <asm/arch/armada100.h>
+#else
+#error Unsupported SoC...
+#endif
+
+/*
+ * mfp_config
+ *
+ * On most of Marvell SoCs (ex. ARMADA100) there is Multi-Funtion-Pin
+ * configuration registers to configure each GPIO/Function pin on the
+ * SoC.
+ *
+ * This function reads the array of values for
+ * MFPR_X registers and programms them into respective
+ * Multi-Function Pin registers.
+ * It supports - Alternate Function Selection programming.
+ *
+ * Whereas,
+ * The Configureation value is constructed using MFP()
+ * array consists of 32bit values as defined in MFP(xx,xx..) macro
+ */
+void mfp_config(u32 *mfp_cfgs)
+{
+ u32 *p_mfpr = NULL;
+ u32 cfg_val, val;
+
+ do {
+ cfg_val = *mfp_cfgs++;
+ /* exit if End of configuration table detected */
+ if (cfg_val == MFP_EOC)
+ break;
+
+ p_mfpr = (u32 *)(MV_MFPR_BASE
+ + MFP_REG_GET_OFFSET(cfg_val));
+
+ /* Write a mfg register as per configuration */
+ val = 0;
+ if (cfg_val & MFP_AF_FLAG)
+ /* Abstract and program Afternate-Func Selection */
+ val |= cfg_val & MFP_AF_MASK;
+ if (cfg_val & MFP_EDGE_FLAG)
+ /* Abstract and program Edge configuration */
+ val |= cfg_val & MFP_LPM_EDGE_MASK;
+ if (cfg_val & MFP_DRIVE_FLAG)
+ /* Abstract and program Drive configuration */
+ val |= cfg_val & MFP_DRIVE_MASK;
+ if (cfg_val & MFP_PULL_FLAG)
+ /* Abstract and program Pullup/down configuration */
+ val |= cfg_val & MFP_PULL_MASK;
+
+ writel(val, p_mfpr);
+ } while (1);
+ /*
+ * perform a read-back of any MFPR register to make sure the
+ * previous writings are finished
+ */
+ readl(p_mfpr);
+}
diff --git a/include/mvmfp.h b/include/mvmfp.h
new file mode 100644
index 0000000..0b36393
--- /dev/null
+++ b/include/mvmfp.h
@@ -0,0 +1,100 @@
+/*
+ * (C) Copyright 2010
+ * Marvell Semiconductor <www.marvell.com>
+ * Written-by: Prafulla Wadaskar <prafulla@marvell.com>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation; either version 2 of
+ * the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
+ * MA 02110-1301 USA
+ */
+
+#ifndef __MVMFP_H
+#define __MVMFP_H
+
+/*
+ * Header file for MultiFunctionPin (MFP) Configururation framework
+ *
+ * Processors Supported:
+ * 1. Marvell ARMADA100 Processors
+ *
+ * processor to be supported should be added here
+ */
+
+/*
+ * MFP configuration is represented by a 32-bit unsigned integer
+ */
+#define MFP(_off, _pull, _pF, _drv, _dF, _edge, _eF, _afn, _aF) ( \
+ /* bits 31..16 - MFP Register Offset */ (((_off) & 0xffff) << 16) | \
+ /* bits 15..13 - Run Mode Pull State */ (((_pull) & 0x7) << 13) | \
+ /* bit 12 - Unused */ \
+ /* bits 11..10 - Driver Strength */ (((_drv) & 0x3) << 10) | \
+ /* bit 09 - Pull State flag */ (((_pF) & 0x1) << 9) | \
+ /* bit 08 - Drv-strength flag */ (((_dF) & 0x1) << 8) | \
+ /* bit 07 - Edge-det flag */ (((_eF) & 0x1) << 7) | \
+ /* bits 06..04 - Edge Detection */ (((_edge) & 0x7) << 4) | \
+ /* bits 03..00 - Alt-fun flag */ (((_aF) & 0x1) << 3) | \
+ /* bits Alternate-fun select */ ((_afn) & 0x7))
+
+/*
+ * to facilitate the definition, the following macros are provided
+ *
+ * offset, pull,pF, drv,dF, edge,eF ,afn,aF
+ */
+#define MFP_OFFSET_MASK MFP(0xffff, 0,0, 0,0, 0,0, 0,0)
+#define MFP_REG(x) MFP(x, 0,0, 0,0, 0,0, 0,0)
+#define MFP_REG_GET_OFFSET(x) ((x & MFP_OFFSET_MASK) >> 16)
+
+#define MFP_AF_FLAG MFP(0x0000, 0,0, 0,0, 0,0, 0,1)
+#define MFP_DRIVE_FLAG MFP(0x0000, 0,0, 0,1, 0,0, 0,0)
+#define MFP_EDGE_FLAG MFP(0x0000, 0,0, 0,0, 0,1, 0,0)
+#define MFP_PULL_FLAG MFP(0x0000, 0,1, 0,0, 0,0, 0,0)
+
+#define MFP_AF0 MFP(0x0000, 0,0, 0,0, 0,0, 0,1)
+#define MFP_AF1 MFP(0x0000, 0,0, 0,0, 0,0, 1,1)
+#define MFP_AF2 MFP(0x0000, 0,0, 0,0, 0,0, 2,1)
+#define MFP_AF3 MFP(0x0000, 0,0, 0,0, 0,0, 3,1)
+#define MFP_AF4 MFP(0x0000, 0,0, 0,0, 0,0, 4,1)
+#define MFP_AF5 MFP(0x0000, 0,0, 0,0, 0,0, 5,1)
+#define MFP_AF6 MFP(0x0000, 0,0, 0,0, 0,0, 6,1)
+#define MFP_AF7 MFP(0x0000, 0,0, 0,0, 0,0, 7,1)
+#define MFP_AF_MASK MFP(0x0000, 0,0, 0,0, 0,0, 7,0)
+
+#define MFP_LPM_EDGE_NONE MFP(0x0000, 0,0, 0,0, 0,1, 0,0)
+#define MFP_LPM_EDGE_RISE MFP(0x0000, 0,0, 0,0, 1,1, 0,0)
+#define MFP_LPM_EDGE_FALL MFP(0x0000, 0,0, 0,0, 2,1, 0,0)
+#define MFP_LPM_EDGE_BOTH MFP(0x0000, 0,0, 0,0, 3,1, 0,0)
+#define MFP_LPM_EDGE_MASK MFP(0x0000, 0,0, 0,0, 3,0, 0,0)
+
+#define MFP_DRIVE_VERY_SLOW MFP(0x0000, 0,0, 0,1, 0,0, 0,0)
+#define MFP_DRIVE_SLOW MFP(0x0000, 0,0, 1,1, 0,0, 0,0)
+#define MFP_DRIVE_MEDIUM MFP(0x0000, 0,0, 2,1, 0,0, 0,0)
+#define MFP_DRIVE_FAST MFP(0x0000, 0,0, 3,1, 0,0, 0,0)
+#define MFP_DRIVE_MASK MFP(0x0000, 0,0, 3,0, 0,0, 0,0)
+
+#define MFP_PULL_NONE MFP(0x0000, 0,1, 0,0, 0,0, 0,0)
+#define MFP_PULL_LOW MFP(0x0000, 1,1, 0,0, 0,0, 0,0)
+#define MFP_PULL_HIGH MFP(0x0000, 2,1, 0,0, 0,0, 0,0)
+#define MFP_PULL_BOTH MFP(0x0000, 3,1, 0,0, 0,0, 0,0)
+#define MFP_PULL_FLOAT MFP(0x0000, 4,1, 0,0, 0,0, 0,0)
+#define MFP_PULL_MASK MFP(0x0000, 7,0, 0,0, 0,0, 0,0)
+
+#define MFP_EOC 0xffffffff /* indicates end-of-conf */
+
+/* Functions */
+void mfp_config(u32 *mfp_cfgs);
+
+#endif /* __MVMFP_H */
generated by cgit v1.1 at 2024-11-24 00:52:50 +0000